Java 中的正则表达式"S"元字符
javaobject oriented programmingprogramming
子表达式/元字符"\S"与非空白字符匹配。
示例 1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\S";
String input = "Hello how are you welcome to Tutorialspoint !";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
while(m.find()) {
count++;
}
System.out.println("匹配数:"+count);
}
}
输出
匹配数:38
示例 2
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main( String args[] ) {
String regex = "\S";
Scanner sc = new Scanner(System.in);
System.out.println("请输入5个字符串: ");
String input[] = new String[5];
for (int i=0; i<5; i++) {
input[i] = sc.nextLine();
}
//创建一个 Pattern 对象
Pattern p = Pattern.compile(regex);
System.out.println("每个字符串中不带空格的字符数:");
for(int i=0; i<5;i++) {
//创建一个 Matcher 对象
Matcher m = p.matcher(input[i]);
int count = 0;
while(m.find()) {
count++;
}
System.out.println("String "+i+": "+count);
}
}
}
输出
请输入5个字符串: sample123 test data test *123 ab bc cd de hello how are you welcome to Tutorialspoint 每个字符串中不带空格的字符数: String 0: 9 String 1: 8 String 2: 8 String 3: 8 String 4: 37
